Propylene streams obtained by the conversion of oxygenates to olefins are used as feeds for hydroformylation. The streams may contain measurable amounts of dimethyl ether without adversely impacting the hydroformylation.
[EN] METHOD FOR PRODUCING AMINOTHIAZOLE DERIVATIVE AND PRODUCTION INTERMEDIATE<br/>[FR] PROCÉDÉ DE PRODUCTION D'UN DERIVÉ D'AMINOTHIAZOLE ET INTERMÉDIAIRE DE PRODUCTION
申请人:ZERIA PHARM CO LTD
公开号:WO2006022252A1
公开(公告)日:2006-03-02
Disclosed is a selective demethylation process of a 2-methoxy group. Specifically disclosed is a method for producing a compound represented by the formula (7) below through the following reactions.
[EN] IMPROVEMENTS IN OR RELATING TO ISOBUTYLENE<br/>[FR] AMELIORATIONS APPORTEES A OU RELATIVES A L'ISOBUTYLENE
申请人:EXXONMOBIL CHEM PATENTS INC
公开号:WO2005028404A1
公开(公告)日:2005-03-31
High purity isobutylene streams are obtained by the hydroformylation of mixed butene streams containing butene-1 and isobutylene (and optionally butene-2) under conditions that hydroformylate primarily butene-1 to yield a mixture of valeraldehyde and isobutylene, which may be separated out as an enriched isobutylene stream and used in the production of methyl tertiary butyl ether, tertiary butyl alcohol, di-isobutylene or polyisobutylene.
[EN] HYDROFORMYLATION OF BUTENES COMPRISING ISOBUTYLENE<br/>[FR] HYDROFORMYLATION DE BUTENES COMPRENANT DE L'ISOBUTYLENE
申请人:EXXONMOBIL CHEM PATENTS INC
公开号:WO2005028407A1
公开(公告)日:2005-03-31
Mixed butene streams containing butene-1 and isobutylene and optionally butene-2 are hydroformylated under conditions that hydroformylates all the monomers to yield a mixture of valeraldehydes. Higher temperatures and/or longer residence times and/or higher partial pressure of carbon monoxide than in conventional processes are used to ensure hydroformylation of all the monomers.